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49-251 9mm Dia. x 18mm FL; UV-AR Coated; UV Double-Convex Lens UV-AR 250-425nm

49-251 9mm Dia. x 18mm FL; UV-AR Coated; UV Double-Convex Lens UV-AR 250-425nm

Type
Lens
Subtype
Spherical Lens (Convex-Convex)
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
9 mm
EFL
18 mm
BFL
17.09 mm
R1
16.09 mm
R2
-16.09 mm

Material

Name
Fused Silica
Dispersion Equation
Sellmeier
n (λ)
1.458462342053241
λ
587.6 nm
B1
0.6961663
C1
0.00467914825849 μm2
B2
0.4079426
C2
0.013512063073959999 μm2
B3
0.8974794
C3
97.934002537921 μm2

49-251 9mm Dia. x 18mm FL; UV-AR Coated; UV Double-Convex Lens UV-AR 250-425nm

This is a UV-AR coated, UV double-convex lens, model number 49-251, available from Edmund Optics. The lens has a diameter of 9mm and a focal length of 18mm, making it a compact yet powerful optical component. The base shape is circular, and the lens is spherical, featuring both front and back surfaces curved outwards (convex-convex).

The lens's geometry includes a thickness of 1.32mm at the edge and 2.6mm at the center. The effective focal length (EFL) is 18mm, and the back focal length (BFL) is 17.09mm. The first radius of curvature (R1) is 16.09mm, and the second radius of curvature (R2) is -16.09mm, indicating a converging lens. The inner and outer radii are both 0, suggesting a uniform curvature.

The lens is made from fused silica material, identified as fused sil mal-1965 in the item data. This material is known for its high transparency in the ultraviolet (UV) region, making this lens suitable for UV applications. The lens is coated with a UV-AR coating, providing anti-reflective properties in the UV range of 250-425nm. This coating enhances the lens's performance by reducing unwanted reflections and increasing transmission.

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